I've done some changes:
- Doxygen Javascript bug is fixed (inheritance diagrams in API documentation)
- I've added a "back to top" button on the right side of every h2 title (tutorials only)
- Every h2 title has a unique id that can be used as an anchor (tutorials only)
- I've changed the title of the home page to be "Simple and Fast Multimedia Library" (that was a quick fix, I'll try to put an additional paragraph instead, as suggested) (and the meaning of SFML may also appear directly in the logo, too)
- Fixed all the reported CSS bugs
More important changes (adding sections, redesigning the menu) will come later.
More feedback is still welcome